Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California
Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake co...
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| Autor*in: |
Wang, W [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Rechteinformationen: |
Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of geophysical research / B - Washington, DC : Union, 1978, 122(2017), 9, Seite 7236-7251 |
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| Übergeordnetes Werk: |
volume:122 ; year:2017 ; number:9 ; pages:7236-7251 |
| Links: |
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| DOI / URN: |
10.1002/2016JB013810 |
|---|
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OLC1997683377 |
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| 245 | 1 | 0 | |a Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California |
| 264 | 1 | |c 2017 | |
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| 520 | |a Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below | ||
| 540 | |a Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. | ||
| 650 | 4 | |a coda waves | |
| 650 | 4 | |a crustal scattering and intrinsic attenuation structure | |
| 650 | 4 | |a Monte Carlo seismic modeling | |
| 650 | 4 | |a Energy use | |
| 650 | 4 | |a Earthquakes | |
| 650 | 4 | |a Ground motion | |
| 650 | 4 | |a Data processing | |
| 650 | 4 | |a Mathematical models | |
| 650 | 4 | |a Oceanic crust | |
| 650 | 4 | |a Statistical analysis | |
| 650 | 4 | |a Attenuation | |
| 650 | 4 | |a Seismograms | |
| 650 | 4 | |a Half spaces | |
| 650 | 4 | |a Wave scattering | |
| 650 | 4 | |a Data | |
| 650 | 4 | |a Computer simulation | |
| 650 | 4 | |a Wave attenuation | |
| 650 | 4 | |a Energy | |
| 650 | 4 | |a Seismic activity | |
| 650 | 4 | |a Waves | |
| 650 | 4 | |a Earthquake construction | |
| 650 | 4 | |a Heterogeneity | |
| 700 | 1 | |a Shearer, P. M |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of geophysical research / B |d Washington, DC : Union, 1978 |g 122(2017), 9, Seite 7236-7251 |w (DE-627)129366382 |w (DE-600)161666-3 |w (DE-576)014740451 |x 0148-0227 |7 nnns |
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| 856 | 4 | 1 | |u http://dx.doi.org/10.1002/2016JB013810 |3 Volltext |
| 856 | 4 | 2 | |u http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract |
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10.1002/2016JB013810 doi PQ20171228 (DE-627)OLC1997683377 (DE-599)GBVOLC1997683377 (PRQ)p1378-ff6849ecfb45915dad31aabe5d14803683d808dde9edc6851d01f0f8c1b5f6780 (KEY)0108436420170000122000907236usingdirectandcodawaveenvelopestoresolvethescatter DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Wang, W verfasserin aut Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. coda waves crustal scattering and intrinsic attenuation structure Monte Carlo seismic modeling Energy use Earthquakes Ground motion Data processing Mathematical models Oceanic crust Statistical analysis Attenuation Seismograms Half spaces Wave scattering Data Computer simulation Wave attenuation Energy Seismic activity Waves Earthquake construction Heterogeneity Shearer, P. M oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 122(2017), 9, Seite 7236-7251 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:122 year:2017 number:9 pages:7236-7251 http://dx.doi.org/10.1002/2016JB013810 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract https://search.proquest.com/docview/1950096462 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 122 2017 9 7236-7251 |
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10.1002/2016JB013810 doi PQ20171228 (DE-627)OLC1997683377 (DE-599)GBVOLC1997683377 (PRQ)p1378-ff6849ecfb45915dad31aabe5d14803683d808dde9edc6851d01f0f8c1b5f6780 (KEY)0108436420170000122000907236usingdirectandcodawaveenvelopestoresolvethescatter DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Wang, W verfasserin aut Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. coda waves crustal scattering and intrinsic attenuation structure Monte Carlo seismic modeling Energy use Earthquakes Ground motion Data processing Mathematical models Oceanic crust Statistical analysis Attenuation Seismograms Half spaces Wave scattering Data Computer simulation Wave attenuation Energy Seismic activity Waves Earthquake construction Heterogeneity Shearer, P. M oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 122(2017), 9, Seite 7236-7251 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:122 year:2017 number:9 pages:7236-7251 http://dx.doi.org/10.1002/2016JB013810 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract https://search.proquest.com/docview/1950096462 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 122 2017 9 7236-7251 |
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10.1002/2016JB013810 doi PQ20171228 (DE-627)OLC1997683377 (DE-599)GBVOLC1997683377 (PRQ)p1378-ff6849ecfb45915dad31aabe5d14803683d808dde9edc6851d01f0f8c1b5f6780 (KEY)0108436420170000122000907236usingdirectandcodawaveenvelopestoresolvethescatter DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Wang, W verfasserin aut Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. coda waves crustal scattering and intrinsic attenuation structure Monte Carlo seismic modeling Energy use Earthquakes Ground motion Data processing Mathematical models Oceanic crust Statistical analysis Attenuation Seismograms Half spaces Wave scattering Data Computer simulation Wave attenuation Energy Seismic activity Waves Earthquake construction Heterogeneity Shearer, P. M oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 122(2017), 9, Seite 7236-7251 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:122 year:2017 number:9 pages:7236-7251 http://dx.doi.org/10.1002/2016JB013810 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract https://search.proquest.com/docview/1950096462 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 122 2017 9 7236-7251 |
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10.1002/2016JB013810 doi PQ20171228 (DE-627)OLC1997683377 (DE-599)GBVOLC1997683377 (PRQ)p1378-ff6849ecfb45915dad31aabe5d14803683d808dde9edc6851d01f0f8c1b5f6780 (KEY)0108436420170000122000907236usingdirectandcodawaveenvelopestoresolvethescatter DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Wang, W verfasserin aut Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. coda waves crustal scattering and intrinsic attenuation structure Monte Carlo seismic modeling Energy use Earthquakes Ground motion Data processing Mathematical models Oceanic crust Statistical analysis Attenuation Seismograms Half spaces Wave scattering Data Computer simulation Wave attenuation Energy Seismic activity Waves Earthquake construction Heterogeneity Shearer, P. M oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 122(2017), 9, Seite 7236-7251 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:122 year:2017 number:9 pages:7236-7251 http://dx.doi.org/10.1002/2016JB013810 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract https://search.proquest.com/docview/1950096462 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 122 2017 9 7236-7251 |
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10.1002/2016JB013810 doi PQ20171228 (DE-627)OLC1997683377 (DE-599)GBVOLC1997683377 (PRQ)p1378-ff6849ecfb45915dad31aabe5d14803683d808dde9edc6851d01f0f8c1b5f6780 (KEY)0108436420170000122000907236usingdirectandcodawaveenvelopestoresolvethescatter DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Wang, W verfasserin aut Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. coda waves crustal scattering and intrinsic attenuation structure Monte Carlo seismic modeling Energy use Earthquakes Ground motion Data processing Mathematical models Oceanic crust Statistical analysis Attenuation Seismograms Half spaces Wave scattering Data Computer simulation Wave attenuation Energy Seismic activity Waves Earthquake construction Heterogeneity Shearer, P. M oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 122(2017), 9, Seite 7236-7251 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:122 year:2017 number:9 pages:7236-7251 http://dx.doi.org/10.1002/2016JB013810 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract https://search.proquest.com/docview/1950096462 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 122 2017 9 7236-7251 |
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Wang, W |
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Wang, W ddc 550 bkl 38.70 misc coda waves misc crustal scattering and intrinsic attenuation structure misc Monte Carlo seismic modeling misc Energy use misc Earthquakes misc Ground motion misc Data processing misc Mathematical models misc Oceanic crust misc Statistical analysis misc Attenuation misc Seismograms misc Half spaces misc Wave scattering misc Data misc Computer simulation misc Wave attenuation misc Energy misc Seismic activity misc Waves misc Earthquake construction misc Heterogeneity Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California |
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550 DNB 38.70 bkl Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California coda waves crustal scattering and intrinsic attenuation structure Monte Carlo seismic modeling Energy use Earthquakes Ground motion Data processing Mathematical models Oceanic crust Statistical analysis Attenuation Seismograms Half spaces Wave scattering Data Computer simulation Wave attenuation Energy Seismic activity Waves Earthquake construction Heterogeneity |
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ddc 550 bkl 38.70 misc coda waves misc crustal scattering and intrinsic attenuation structure misc Monte Carlo seismic modeling misc Energy use misc Earthquakes misc Ground motion misc Data processing misc Mathematical models misc Oceanic crust misc Statistical analysis misc Attenuation misc Seismograms misc Half spaces misc Wave scattering misc Data misc Computer simulation misc Wave attenuation misc Energy misc Seismic activity misc Waves misc Earthquake construction misc Heterogeneity |
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ddc 550 bkl 38.70 misc coda waves misc crustal scattering and intrinsic attenuation structure misc Monte Carlo seismic modeling misc Energy use misc Earthquakes misc Ground motion misc Data processing misc Mathematical models misc Oceanic crust misc Statistical analysis misc Attenuation misc Seismograms misc Half spaces misc Wave scattering misc Data misc Computer simulation misc Wave attenuation misc Energy misc Seismic activity misc Waves misc Earthquake construction misc Heterogeneity |
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Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California |
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using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of southern california |
| title_auth |
Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California |
| abstract |
Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below |
| abstractGer |
Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below |
| abstract_unstemmed |
Characterizing scattering and absorbing properties and the power spectrum of crustal heterogeneity is a fundamental problem for informing strong ground motion estimates at high frequencies, where scattering and attenuation effects are critical. We perform a comprehensive study of local earthquake coda waves in Southern California to constrain scattering and intrinsic attenuation structure. We analyze data from 1195 spatially distributed earthquakes from 1981 to 2013 at source depths of 10 to 15 km and epicentral distances from 0 to 250 km with magnitudes larger than 1.8. We stack envelope functions from 28,127 vertical component and 27,521 transverse component seismograms, filtered from 2 to 4 Hz. We model these observations using a particle‐based Monte Carlo algorithm that includes intrinsic attenuation as well as both P and S wave scattering and both single and multiple scattering events. We find that spatially averaged coda wave behavior for Southern California can be explained only with models containing an increase in scattering strength and intrinsic attenuation within the uppermost crust, i.e., they are poorly fit with half‐space models of constant scattering strength. A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below |
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Using direct and coda wave envelopes to resolve the scattering and intrinsic attenuation structure of Southern California |
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http://dx.doi.org/10.1002/2016JB013810 http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract https://search.proquest.com/docview/1950096462 |
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A reasonable fit to our data is obtained with a two‐layer model, composed of a shallow crustal layer with strong wide‐angle scattering and high P and S intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation (top 5.5 km: α Q I =250, β Q I =125, heterogeneity correlation length a = 50 m, fractional velocity heterogeneity ε = 0.4; lower crust: α Q I =900, β Q I =400, a = 2 km, ε = 0.05). In summary, we have built a one‐dimensional depth‐dependent intrinsic and scattering attenuation model of Southern California to resolve the characteristics of the high‐frequency (2–4 Hz) wavefield for events from 1981 to 2013. The envelope function stacking method provides the spatially averaged coda energy, including both the P and S wave coda decay and their relative amplitude information. We model the data stacks using energy‐conserving and multiscattering regional Monte Carlo simulations. The synthetic results show the Southern California region can be reasonably fit with a two‐layered model composed of a shallow crustal layer with strong wide‐angle scattering and high intrinsic attenuation and a deeper layer with weaker scattering and lower intrinsic attenuation. We stack coda waves in Southern California using thousands of envelope functions We model the data using a Monte Carlo approach and a simple 1‐D model of scattering and attenuation Our preferred model has strong scattering and intrinsic attenuation in the upper crust with weaker attenuation below</subfield></datafield><datafield tag="540" ind1=" " ind2=" "><subfield code="a">Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">coda waves</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">crustal scattering and intrinsic attenuation structure</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Monte Carlo seismic modeling</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Energy use</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Earthquakes</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Ground motion</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Data processing</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Mathematical models</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Oceanic crust</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Statistical analysis</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Attenuation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Seismograms</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Half spaces</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Wave scattering</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Data</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Computer simulation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Wave attenuation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Energy</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Seismic activity</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Waves</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Earthquake construction</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Heterogeneity</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Shearer, P. M</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Journal of geophysical research / B</subfield><subfield code="d">Washington, DC : Union, 1978</subfield><subfield code="g">122(2017), 9, Seite 7236-7251</subfield><subfield code="w">(DE-627)129366382</subfield><subfield code="w">(DE-600)161666-3</subfield><subfield code="w">(DE-576)014740451</subfield><subfield code="x">0148-0227</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:122</subfield><subfield code="g">year:2017</subfield><subfield code="g">number:9</subfield><subfield code="g">pages:7236-7251</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">http://dx.doi.org/10.1002/2016JB013810</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">http://onlinelibrary.wiley.com/doi/10.1002/2016JB013810/abstract</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">https://search.proquest.com/docview/1950096462</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-PHY</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2027</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2279</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">38.70</subfield><subfield code="q">AVZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">122</subfield><subfield code="j">2017</subfield><subfield code="e">9</subfield><subfield code="h">7236-7251</subfield></datafield></record></collection>
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